Achieve smooth and luminous skin with COSRX The Retinol 0.5 Oil. Formulated using 0.5% stabilised, pure retinol for powerful anti-ageing care. This retinol oil is best for skin accustomed to retinol but still experiencing progressive signs of ageing such as fine lines, wrinkles, loss of elasticity and dryness. The formula harnesses the nourishing properties of plant-derived squalane to help protect against dryness, while Vitamin A supports collagen production and skin cell turnover and vitamin E reduces visible signs of ageing and skin damage. This serum is suitable for all skin types and for intermediate-level retinol users looking for a highly concentrated, youth booster.